Simplify potentially quadratic behavior while erasing elements from std::vector.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166045 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 7 deletions

diff --git a/lib/Transforms/Scalar/DCE.cpp b/lib/Transforms/Scalar/DCE.cpp
index 086f0a1a71..8d53443b38 100644
--- a/lib/Transforms/Scalar/DCE.cpp
+++ b/lib/Transforms/Scalar/DCE.cpp
@@ -118,13 +118,7 @@ bool DCE::runOnFunction(Function &F) {
       I->eraseFromParent();
 
       // Remove the instruction from the worklist if it still exists in it.
-      for (std::vector<Instruction*>::iterator WI = WorkList.begin();
-           WI != WorkList.end(); ) {
-        if (*WI == I)
-          WI = WorkList.erase(WI);
-        else
-          ++WI;
-      }
+      WorkList.erase(std::remove(WorkList.begin(), WorkList.end(), I), WorkList.end());
 
       MadeChange = true;
       ++DCEEliminated;